If you define the symbol BOOST_OCTONION_TEST_VERBOSE, you will get additional
output (verbose output);
this will only be helpfull if you enable message output at the same time,
of course (by uncommenting the relevant line in the test or by adding --log_level=messages
to your command line,...). In that case, and if you are running interactively,
you may in addition define the symbol BOOST_INTERACTIVE_TEST_INPUT_ITERATOR
to interactively test the input operator with input of your choice from the
standard input (instead of hard-coding it in the test).